Welding-tool.



Patented Mar. 15, 1910.

L. WOLF.

WELDNG- TGOL.

APPLICATION FILED JUNE 14,1909. 5,08%

@uw NNR Nm ran earns ramena orribile LINUS WOLF, F BOSTON, MASSACHUSETTSL WELDNG-TQOL.

Specification of Letters Patent. Pmggmgdl Mgg, 159 91@ Application led June 14,

w09. Serial No. 501,918.

To all 'whom it muy concern:

Be it known that I, LINUS. WOLF, a subject of the Emperory of Germany, residing at Boston, county ot Sudolk, and State of Massachusetts, have invented an Improvement in Welding-Tools, of which the following description, in vconnect-ion with theaccompanying drawing, is a` specication, like numerals on the drawing representing like arts.

P This inventionv relates to that class of welding tools which are adapted for autogenous weldin that is, welding which is accomplishe by means of a Haine produced by the mixture of oxygen and some other gas. r

lSo far as I amaware all prior tools of this nature are designed to be used with a mixture of oxy en and a comparatively light as, such as hydrogen, and such tools cannot e successfully used where the -flame is produced by a mixture of oxygen with aheavier gas because the heavier gas does not'mix as readily with the oxygen, and the tools as heretofore constructed are not adapted for securing the necessary intimate mixture between oxygen'and heavy gas to produce a proper dame.

rThe object of my invention is to produce a novel tool of this character in which a heavy gas can be used in connection with oxygen for producing a dame of `a 'high temperature, and ll accomplish this end by a special arrangementy of mixing chamber which results in a thoroughI and intimatev mixture between the two gases used.

l-will Ersti describe one embodiment-'of my invention and then point 'out the novel features thereof in the appended claims.

ln the drawings, Figure 1 is a side view of a tool embodying my invention; F ig. 2 is a longitudinal section thereof.

rihe tool comprises the body portion 8 which constitutes a handle by which it may be held, and a tubular neck ft extending from the body portion and terminating in a nozzle 5 at the end of whichvthe flame is produced. rlhe oxygen is supplied to the device through a pipe 6 and the other gas is supplied through a pipe 7. rlihe body 3 is formed on its interior with a primary mixing chamber 8 into which the'oxygen and other gas are delivered separately, and in which they are partially mixed. From the mixing chamber 8 the partially-mixed ases are taken to a second mixing cham er 9 in which the mixing is completed, and from this chamber they are delivered to the interior bore of the neck 4, from which they pass to the nozzle 5.

The primary mixing chamber 8 is ar- 'ranged sol that the two different gases are delivered thereto at opposite sides, and in opposite directions, -with the result that the two streams of gases meet each other in the mixing chamber and become broken up and quite thoroughly mixed. r1`he second mixing chamber 9 isl so arran ed that as the partially-mixed gases are elivered thereto, they are given eddy currents, or a whirling motion, which completes the mixmg.

The oxygen inlet pipe 6 communicates with a port 10 leading into one end of the primary mixing chamber 8. The pi e 7 communicates with a port 12 which eads to a pipe 11 situated on the exterior of the body, said pipe being forined into a coil 13 which encircles the neck 4 adjacent to the nozzle 5. This coil constitutes a heating coil in which the heavy gas is heated before it is introduced to the mixing chamber 8.

`The pipe l1 terminates at a port 14 which leads into the mixing chamber 8 at a point opposite to the port 10, and preferably the two ports 10 and 14 are so disposed that the two streams of gas issuing therefrom will v meet each other in the mlxlng chamber. 8.

By means of this construction, the gases become quite thoroughly mixed in the chamber 8. The two mixing chambers 8 and 9 communicate with each other through a port 16.

1n order to get a more thorough mixin in the chamber 9, l pro ose lto make sai chamber with curved wa ls, and preferably the chamber will be spherical in shape, and i also propose to place the inlet port 16 so that the stream or partially-mixed gases is delivered therefrom in a direction. substantially tangential to the curved walt of the chamber 9. As the stream of gas enters said chamber 9 itis given a whirling motion, which operates to complete the mixing ot the two gases.

The body 8- may be made in various ways in order to secure the two desired mixing chambers without departing trom my invention. As onev convenient and mechanical way, )I have shown it as comprising the section i7 to which the stem .le is secured and which ie holliowed out to torni a portion oir' the chamber 9, and which is also screwthreaded to another section 18 in which the chamber 8 and the ports 14 and 16 are formed. The body 3 also comprises a section 19, which supports the pipes 6 and? and which is screw-threaded to the section 18. The section 19 is shown as provided with the nipple 20 through which the port 12 extends, and the pipe 11 is connected to this nipple by means of an ordinary union 21. rlihese details of construction, however, are not essential to the invention.

While my invention is of such a construction that it can be successfully used with any heavyA gas mixed with oxygen,-yet I have found that it works especially well when f liquid gas such,tor instance, as

would be produced by the apparatus shown in my Patent No. 909,125, 1s mixed with oxygen.

Having fully described my invention, what l claim as new and desire to secure by Letters Patent is 1. lin a welding tool, the combination with a body having a mixing chamber and provided with inlet ports on opposite sides thereof, of a burner nozzle supported by the body and communicating with the mixing chamber, a heating coil associated with the nozzle and communicating with one oi said ports, and an inlet pipe communicating with the other ot said ports.

2. ln a welding tool, the combination with a body having a mixing chamber provided with two dports situated at opposite sides thereof an directed toward each other, said body having a second mixing chamber com- @cacao -sides thereof, said body also having a secondary mixing chamber provided with curved Walls and a ort connecting saidchambers and arranged to deliver gas tangentially against the curved wall of the secondary mixing chamber, of a burner nozzle communicating .with said secondary mixing chamber, and means to deliver two separate gases to the ports of the primary mixing chamber.

f1. In a Welding tool, the combination with a primary mixing chamber and means to introduce two separate ases thereto at opposite sides and in opposite directions, of a secondar spherical mlxing chamber and means to deiiver @as from the primary mixing chamber to the secondary mixing chamber in a direction substantially tangentially to the wall of the latter chamber, anda nozzle communicating with Said latter chamber.

In testimony whereof, i have signed my name to this specification, in the presence of two subscribing witnesses.

LlNUS WLF. `Witnessesz Lome C. SMITH, FREDERICK S. GREENLEAF. 

